nrf52832 combining SPI and UART printf problem

[jreid27044]

Hi all,

I took the example SPI program and I am trying to add UART code to it to debug the SPI transfers. Both examples are working well for me separately. I was able to combine both sets of code (main.c looks good and sdk_config.h looks good) and add all the Libraries and drivers. It is able to compile and run.

In the process of integrating the two examples, I was manually adding the UART code to the SPI code. With everything combined, I run the normal SPI code and it blinks the LED every 200ms (as it should). Verified everything is generally working.

Next, I add a printf statement like the UART code to verify that any old printf will work. This command seems to block all code after it. When I drill in with the debugger, it seems like no errors are being thrown.

Two questions:

• why wont printf statements work?
• is there a smarter way to print out debug information in the framework of the SPI code? I read about RTT.

[Jørgen Holmefjord]

Which SDK version are you using? Have you enabled retarget in sdk_config.h (if using SDK 12.x)?

#ifndef RETARGET_ENABLED
#define RETARGET_ENABLED 1
#endif